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annotate dwt/widgets/Scrollable.d @ 46:cfa563df4fdd

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Updated Widget and Display to 3.514
author Jacob Carlborg <doob@me.com>
date Fri, 05 Dec 2008 16:00:41 +0100
parents d8635bb48c7c
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *
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11 * Port to the D programming language:
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12 * Jacob Carlborg <doob@me.com>
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13 *******************************************************************************/
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14 module dwt.widgets.Scrollable;
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16
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17 import dwt.DWT;
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18 import dwt.DWTException;
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19 import dwt.graphics.Rectangle;
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20 import dwt.internal.cocoa.NSRect;
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21 import dwt.internal.cocoa.NSScrollView;
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22 import dwt.internal.cocoa.NSScroller;
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23 import dwt.internal.cocoa.NSSize;
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24 import dwt.internal.cocoa.NSView;
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25 import dwt.internal.cocoa.OS;
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26 import dwt.internal.cocoa.SWTScroller;
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28 import dwt.dwthelper.utils;
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29 import dwt.widgets.Composite;
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30 import dwt.widgets.Control;
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31 import dwt.widgets.Display;
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32 import dwt.widgets.ScrollBar;
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33 import dwt.widgets.Widget;
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34
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35 /**
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36 * This class is the abstract superclass of all classes which
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37 * represent controls that have standard scroll bars.
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38 * <dl>
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39 * <dt><b>Styles:</b></dt>
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40 * <dd>H_SCROLL, V_SCROLL</dd>
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41 * <dt><b>Events:</b>
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42 * <dd>(none)</dd>
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43 * </dl>
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44 * <p>
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45 * IMPORTANT: This class is intended to be subclassed <em>only</em>
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46 * within the DWT implementation.
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47 * </p>
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48 *
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49 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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50 */
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51 public abstract class Scrollable : Control {
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52 NSScrollView scrollView;
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53 ScrollBar horizontalBar, verticalBar;
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55 this () {
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56 /* Do nothing */
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57 }
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58
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59 /**
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60 * Constructs a new instance of this class given its parent
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61 * and a style value describing its behavior and appearance.
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62 * <p>
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63 * The style value is either one of the style constants defined in
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64 * class <code>DWT</code> which is applicable to instances of this
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65 * class, or must be built by <em>bitwise OR</em>'ing together
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66 * (that is, using the <code>int</code> "|" operator) two or more
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67 * of those <code>DWT</code> style constants. The class description
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68 * lists the style constants that are applicable to the class.
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69 * Style bits are also inherited from superclasses.
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70 * </p>
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71 *
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72 * @param parent a composite control which will be the parent of the new instance (cannot be null)
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73 * @param style the style of control to construct
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74 *
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75 * @exception IllegalArgumentException <ul>
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76 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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77 * </ul>
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78 * @exception DWTException <ul>
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79 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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80 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
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81 * </ul>
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82 *
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83 * @see DWT#H_SCROLL
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84 * @see DWT#V_SCROLL
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85 * @see Widget#checkSubclass
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86 * @see Widget#getStyle
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87 */
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88 public this (Composite parent, int style) {
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89 super (parent, style);
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90 }
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91
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92 bool accessibilityIsIgnored(int /*long*/ id, int /*long*/ sel) {
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93 // Always ignore scrollers.
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94 if (scrollView !is null && id is scrollView.id) return true;
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95 return super.accessibilityIsIgnored(id, sel);
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96 }
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97
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98 /**
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99 * Given a desired <em>client area</em> for the receiver
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100 * (as described by the arguments), returns the bounding
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101 * rectangle which would be required to produce that client
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102 * area.
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103 * <p>
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104 * In other words, it returns a rectangle such that, if the
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105 * receiver's bounds were set to that rectangle, the area
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106 * of the receiver which is capable of displaying data
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107 * (that is, not covered by the "trimmings") would be the
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108 * rectangle described by the arguments (relative to the
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109 * receiver's parent).
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110 * </p>
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111 *
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112 * @param x the desired x coordinate of the client area
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113 * @param y the desired y coordinate of the client area
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114 * @param width the desired width of the client area
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115 * @param height the desired height of the client area
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116 * @return the required bounds to produce the given client area
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117 *
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118 * @exception DWTException <ul>
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119 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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120 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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121 * </ul>
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122 *
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123 * @see #getClientArea
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124 */
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125 public Rectangle computeTrim (int x, int y, int width, int height) {
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126 checkWidget();
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127 if (scrollView !is null) {
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128 NSSize size = NSSize();
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129 size.width = width;
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130 size.height = height;
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131 NSBorderType border = hasBorder() ? NSBezelBorder : NSNoBorder;
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132 size = NSScrollView.frameSizeForContentSize(size, (style & DWT.H_SCROLL) !is 0, (style & DWT.V_SCROLL) !is 0, border);
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133 width = cast(int)size.width;
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134 height = cast(int)size.height;
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135 NSRect frame = scrollView.contentView().frame();
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136 x -= frame.x;
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137 y -= frame.y;
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138 }
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139 return new Rectangle (x, y, width, height);
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140 }
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141
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142 ScrollBar createScrollBar (int style) {
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143 if (scrollView is null) return null;
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144 ScrollBar bar = new ScrollBar ();
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145 bar.parent = this;
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146 bar.style = style;
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147 bar.display = display;
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148 NSScroller scroller;
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642f460a0908 Fixed a lot of compile errors, a "hello world" app compiles now
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149 String actionSelector;
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150 NSRect rect = NSRect();
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151 if ((style & DWT.H_SCROLL) !is 0) {
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152 rect.width = 1;
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153 } else {
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154 rect.height = 1;
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155 }
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156 scroller = (NSScroller)new SWTScroller().alloc();
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157 scroller.initWithFrame(rect);
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158 if ((style & DWT.H_SCROLL) !is 0) {
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159 scrollView.setHorizontalScroller(scroller);
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160 actionSelector = OS.sel_sendHorizontalSelection;
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161 } else {
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162 scrollView.setVerticalScroller(scroller);
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163 actionSelector = OS.sel_sendVerticalSelection;
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164 }
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165 bar.view = scroller;
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166 //bar.createJNIRef();
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167 bar.register();
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168 if ((state & CANVAS) is 0) {
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169 bar.target = scroller.target();
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170 bar.actionSelector = scroller.action();
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171 }
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172 scroller.setTarget(scrollView);
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173 scroller.setAction(actionSelector);
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174 return bar;
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175 }
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176
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177 void createWidget () {
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178 super.createWidget ();
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179 if ((style & DWT.H_SCROLL) !is 0) horizontalBar = createScrollBar (DWT.H_SCROLL);
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180 if ((style & DWT.V_SCROLL) !is 0) verticalBar = createScrollBar (DWT.V_SCROLL);
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181 }
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182
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183 void deregister () {
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184 super.deregister ();
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185 if (scrollView !is null) display.removeWidget (scrollView);
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186 }
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187
0
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188 /**
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189 * Returns a rectangle which describes the area of the
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190 * receiver which is capable of displaying data (that is,
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191 * not covered by the "trimmings").
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192 *
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193 * @return the client area
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194 *
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195 * @exception DWTException <ul>
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196 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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197 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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198 * </ul>
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199 *
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200 * @see #computeTrim
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201 */
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202 public Rectangle getClientArea () {
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203 checkWidget();
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204 if (scrollView !is null) {
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205 NSSize size = scrollView.contentSize();
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206 return new Rectangle(0, 0, cast(int)size.width, cast(int)size.height);
0
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207 } else {
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208 NSRect rect = view.bounds();
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209 return new Rectangle(0, 0, cast(int)rect.width, cast(int)rect.height);
0
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210 }
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211 }
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212
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213 /**
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214 * Returns the receiver's horizontal scroll bar if it has
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215 * one, and null if it does not.
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216 *
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217 * @return the horizontal scroll bar (or null)
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218 *
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219 * @exception DWTException <ul>
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220 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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221 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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222 * </ul>
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223 */
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224 public ScrollBar getHorizontalBar () {
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225 checkWidget();
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226 return horizontalBar;
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227 }
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228
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229 /**
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230 * Returns the receiver's vertical scroll bar if it has
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231 * one, and null if it does not.
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232 *
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233 * @return the vertical scroll bar (or null)
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234 *
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235 * @exception DWTException <ul>
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236 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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237 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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238 * </ul>
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239 */
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240 public ScrollBar getVerticalBar () {
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241 checkWidget();
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242 return verticalBar;
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243 }
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244
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245 bool hooksKeys () {
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246 return hooks (DWT.KeyDown) || hooks (DWT.KeyUp) || hooks (DWT.Traverse);
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247 }
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248
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249 bool isTrim (NSView view) {
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250 if (scrollView !is null) {
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251 if (scrollView.id is view.id) return true;
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252 if (horizontalBar !is null && horizontalBar.view.id is view.id) return true;
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253 if (verticalBar !is null && verticalBar.view.id is view.id) return true;
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254 }
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255 return super.isTrim (view);
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256 }
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257
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258 void register () {
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259 super.register ();
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260 if (scrollView !is null) display.addWidget (scrollView, this);
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261 }
0
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262
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263 void releaseHandle () {
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264 super.releaseHandle ();
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265 if (scrollView !is null) scrollView.release();
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266 scrollView = null;
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267 }
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268
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269 void releaseChildren (bool destroy) {
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270 if (horizontalBar !is null) {
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271 horizontalBar.release (false);
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272 horizontalBar = null;
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273 }
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274 if (verticalBar !is null) {
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275 verticalBar.release (false);
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276 verticalBar = null;
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277 }
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278 super.releaseChildren (destroy);
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279 }
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280
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281 void sendHorizontalSelection () {
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282 horizontalBar.sendSelection ();
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283 }
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284
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285 void sendVerticalSelection () {
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286 verticalBar.sendSelection ();
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287 }
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288
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289 bool setScrollBarVisible (ScrollBar bar, bool visible) {
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290 if (scrollView is null) return false;
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291 if ((state & CANVAS) is 0) return false;
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292 if (visible) {
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293 if ((bar.state & HIDDEN) is 0) return false;
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294 bar.state &= ~HIDDEN;
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295 } else {
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296 if ((bar.state & HIDDEN) !is 0) return false;
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297 bar.state |= HIDDEN;
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298 }
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299 if ((bar.style & DWT.HORIZONTAL) !is 0) {
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300 scrollView.setHasHorizontalScroller (visible);
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301 } else {
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302 scrollView.setHasVerticalScroller (visible);
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303 }
0
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304 bar.sendEvent (visible ? DWT.Show : DWT.Hide);
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305 sendEvent (DWT.Resize);
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306 return true;
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307 }
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308
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309 void setZOrder () {
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310 super.setZOrder ();
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311 if (scrollView !is null) scrollView.setDocumentView (view);
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312 }
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313
0
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314 NSView topView () {
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315 if (scrollView !is null) return scrollView;
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316 return super.topView ();
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317 }
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318 }